107 lines
3.0 KiB
C++
107 lines
3.0 KiB
C++
/// ReMixer
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/// A Public Domain C++ Audio Playback Library
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/// By william @ RedactedSoftware. Thanks to Dawsh & Maxine.
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/// (c) 2024 Redacted Software
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/// This work is explicitly dedicated to the public domain, for the hopeful betterment of the software industry.
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/// @file pacat_simple.cpp
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/// @desc A CLI program that plays back raw PCM data (given as a file) over the PulseAudio service.
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/// @edit 2024-08-19
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#include <iostream>
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#include <cstdio>
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#include <unistd.h>
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#include <cstring>
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#include <cerrno>
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#include <fcntl.h>
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#include <pulse/simple.h>
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#include <pulse/error.h>
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#include <pulse/volume.h>
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#include <pulse/thread-mainloop.h>
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#define BUFSIZE 1024
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int main(int argc, char* argv[])
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{
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if (argc == 1 || argv[1] == "-h" || argv[1] == "help")
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{
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std::cout << "pacat - Tests playback of raw audio data via PulseAudio API." << std::endl;
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std::cout << "usage: pacat <file> (presumably output.raw)\n" << std::endl;
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}
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static const pa_sample_spec ss = {
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.format = PA_SAMPLE_S16LE,
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.rate = 44100,
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.channels = 2
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};
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pa_simple *s = NULL;
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int ret = 1;
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int error;
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/* Replace STDIN with the specified file if needed. */
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if (argc > 1) {
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int fd;
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if ((fd = open(argv[1], O_RDONLY)) < 0) {
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fprintf(stderr, __FILE__": open() failed: %s\n", strerror(errno));
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goto finish;
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}
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if (dup2(fd, STDIN_FILENO) < 0) {
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fprintf(stderr, __FILE__": dup2() failed: %s\n", strerror(errno));
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goto finish;
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}
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close(fd);
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}
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/* Create a new playback stream */
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if (!(s = pa_simple_new(NULL, argv[0], PA_STREAM_PLAYBACK, NULL, "playback", &ss, NULL, NULL, &error))) {
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fprintf(stderr, __FILE__": pa_simple_new() failed: %s\n", pa_strerror(error));
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goto finish;
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}
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for (;;) {
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uint8_t buf[BUFSIZE];
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ssize_t r;
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#if 0
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pa_usec_t latency;
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if ((latency = pa_simple_get_latency(s, &error)) == (pa_usec_t)-1)
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{
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fprintf(stderr, __FILE__": pa_simple_get_latency() failed: %s\n", pa_strerror(error));
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return;
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}
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fprintf(stderr, "%0.0f usec \r", (float)latency);
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#endif
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/* Read some data */
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if ((r = read(STDIN_FILENO, buf, sizeof(buf))) <= 0) {
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if (r == 0) /* EOF */
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break;
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fprintf(stderr, __FILE__": read() failed: %s\n", strerror(errno));
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goto finish;
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}
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/* and play it */
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if (pa_simple_write(s, buf, (size_t)r, &error) < 0) {
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fprintf(stderr, __FILE__": pa_simple_write() failed: %s\n", pa_strerror(error));
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goto finish;
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}
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}
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/* Make sure that every single sample was played */
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if (pa_simple_drain(s, &error) < 0) {
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fprintf(stderr, __FILE__": pa_simple_drain() failed: %s\n", pa_strerror(error));
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goto finish;
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}
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ret = 0;
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finish:
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if (s)
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pa_simple_free(s);
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return ret;
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}
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